PacSafe - Venturesafe 45L GII

The Venturesafe 45L GII from Pacsafe is a carry-on-size travel pack with a plethora of security features to keep your gear safe from pickpockets and thieves while traveling. eXomesh® slashproof fabric, puncture-resistant ToughZip™ zipper, 3mm locking steel cable, RooBar™ anchor lock, and locking zipper pulls all help to give you peace of mind while you're trotting the globe. The straps on the Venturesafe 45 tuck away, so you can check it or use it as a duffle bag without getting tangled up, and the panel-loading design makes it easy to pack and unpack.
The Venturesafe 45L GII is maximum legal carry-on size for North American airlines.